Valve grinder



Feb. 19, 1929.

A. M. LIBERTY VALVE G RI NDER Filed June 9, 1926 ALEXA/1056 MAME/r7):Didi/SID wAm,

Patented Feb. 19, 1929.

* rm STATES; IPAjr LIBERTY, DECEASED, LATE OF FAUST, NEW YORK, BY LouisLA ALEXANDER i r oFF IC PoRTnAn INIsTRAToE, o'E nUs'r, EW YORK. I

- VALVE GnINDER.

i -.App licationfiled June 9,

This invention is avalve grinder for grinding, retacing and resenting.thevalves of in ternal combustion engines.

"ne'objeet of the invention is to provide a relatively simple,practical. and e'flicient tool tor the purpose mentioned, the same beingadapted for refaoing in one operation and si inultaneously, thecontacting faces of both the valve and the valve seat ithout removingthevalve from its mounting. o i

Another object is to'furnish a handy means for applying the grindingcompound.

lnthedrawing l v h Figure l is a vertical section through the improvedtool as positioned for use upon a valve iniounted in-a cylinder, block;

Figure 2 is a detail vieWof the toolfas opened for positioning upon theWork;

Figure 3 is a top end View ofthe'tool; Figure 4 is a bottoin end vie-Wvot' thetool; Figure 5 is a top plan vieW ofthe' device taken in a planecutting the rod at right an? 10 being shown in section. p

' The invention comprises a bell-like grinds ing thinible 1, made up or"two longitudinally defined h all sections 2 and S-yvhiehar'e hingedtogether by. a lower-hinge 4 and so adaptedto glee and slightly abovethe ring 9 the said rod open apart. A turn handle 5 is rigidly at-.taehed near the up er end oi: the section 2 and exteinled horizontallyand provided with a hand knob 6. The otherseeti'on 3 is their, hinged byan upperelongatml hinge 7 to the handleh whereby the two bell sectionsare fully supported inhingedrelae' tion. The sections 2 and Kbeinglooked in closed relation, a press rod hole 8 bored through the upperclosed ends of the said 500- tions,and a bearing ring 9 is rigidlymounted within the resulting semi-circular cut-out at the upper endofthe seetion 2.. A pressrod -10 is passedthroughthe.ring 9 and isnicely turned to slidingly and rotatively engage the same. Thelowerendo'f this rodisrounded as shown at 11 to provide a frictionlessrotative bearing upon the Work and the upp'er'end is in'ovidedivith ahand knob 12. Y An additional support is provided for the rodflOpin theway'oif' a supportinglug 18l'aterallyeiztended frornthefinner Wall ofthefseotion 2, andlha'ving a bearing hole l ft formed oblique bitsandvalve seat.

1926. Serial' no. 114,825.

" passed also through the hole ltand is thus tullysupporte'd. A stopring15 is adj ustabl-y loeke'dupon the rod lO-inside the thiinble 1,'

Cit

by means eta set screw 16. a A coil spring 17 is mounted over the rod 10Within the thiinb'le 1 and is braced between the lugll and the ring 15,the normal action of the spring 17 being to force the rod 10 upwardlyand away from the 7 Work. The sections 2 and 3 of the thinible l areprovided at their lower edgeswithsemi-' eircular bits'lS. These bits,are of slight thickness and have parallelfu'pperand lower faces 19 and20 ;v they may be formed int'egral 1y iththe sections 2 and 3 'and'theyare inclined obliquely downwardly and inwardly as shown, the angularinclinationof the hits corresponding to the angularinclination ot' vthemating faces of the valve" 2l and Valve seat'EZQ." I Grindingconipoundeups 23 and 2st 'are inounted upon the outer lower edges of thesections 2 and 3 and have branching ducts 25 and 26 extended througlrthebits 18-andopening'out through the upper and lower faces thereof; Thesecups are provided; With, the usual threaded foree plugs 23 and 24 forvforcing the contents-oif'the cups out through theduets 25 and 2th Inuse and operation the thi nb'le sectionsfl I and 3 are opened. apart andthe bits 1S'are passed under the valve 21am}. )ositionedbe,-

tween the faees off the valve and valveiseat2 2 the sections 2 aud tare'then closed together {and the valve 211s Caused to bear upon theupper faces 01- the bits 18 Wlllli: the lower faces at these bitsin turnbear upon the valve seat 22 so tl at the said bits areadapted to beoper- 7 fatively heldto the Work through the centering effect ofpressure imposed upon thesai'd'valve, v I

p The grinding process is'periiorined by hearing downward upon therodlOand oscillating the'handle 5, whilesimultaneously forcing coarse orfineias'desired. I

grinding compounds out otjthe cups-23 or 2%, v

tain speeificinanner and method of eonstruc't- I V vent-ion, it isunderstood that they} may vary ing and assembling the" eleinentsofl theinfrom the same in minordetailsynot departing v from the spirit of theinvention, so as best to construct a practical device for the purposeintended, as defined in the appended claim.

l/Vhat is claimed is:

In a Valve grindingtool embodying hingedly connected frame members, bitson said frame membersadapted for insertion between the valve and valveseat a spring" set press rod journaled in one of said frame membersadapted to bear directly upon the center of the Valve for supplying asteady Working pressure, and a laterally extended operating han-. dleonone of said frame members for imparting rotative, movement to the bits.

' his LOUIS LA FORTE,

